Bolt-on Super Angle steering knuckles for FRS, BRZ, GT86, GR86. OEM quality cast steel and CNC machined for great strength and symmetry. Features 45mm Roll Center correction, 6 way ackerman Adjustment, 60 degrees Max Steering Angle when combined with the full front parts set, or 46 degrees when using stock arms(stock angle is 35*). Features Two caliper mounting options built in: 1.) OEM caliper, OEM rotor, or 2.) Z32 Alum 4 piston caliper (we sell a 100% new loaded pair for $315) with 05-09 Subaru Legacy GT turbo 316mm rotors. 12.5mm reduced coilover mounting depth leans the knuckle in for -1.5 degree additional camber ability and improves KPI/Included angle. Comes with 24pcs ackerman plates (6 settings X 4 pieces each setting). To get the most steering angle you need to combine this with our front parts set, less the knuckle. If using these knuckles with stock arms, use part # OTRLB outer tie rods because OEM outer tie rods are not compatible. Overall angle clearance depends on wheel and tire size and offset, so wheel spacers or low offset wheels are typically needed. **17" inner wheel barrels vary in shape which could cause interference with lower arms and outer tie rods now that there is roll center correction. So care must be taken to prevent interference on small wheels.